From: Boqun Feng Date: Wed, 27 Jul 2016 15:05:16 +0000 (+0800) Subject: Restartable sequences: Wire up powerpc system call X-Git-Url: http://git.efficios.com/?p=deliverable%2Flinux.git;a=commitdiff_plain;h=15a0a3431ea42b010092c7d8c6be3c26f75d0722 Restartable sequences: Wire up powerpc system call Wire up the rseq system call on powerpc. This provides an ABI improving the speed of a user-space getcpu operation on powerpc by skipping the getcpu system call on the fast path, as well as improving the speed of user-space operations on per-cpu data compared to using load-reservation/store-conditional atomics. Signed-off-by: Boqun Feng Signed-off-by: Mathieu Desnoyers --- diff --git a/arch/powerpc/include/asm/systbl.h b/arch/powerpc/include/asm/systbl.h index 2fc5d4db503c..c68f4d0d00b2 100644 --- a/arch/powerpc/include/asm/systbl.h +++ b/arch/powerpc/include/asm/systbl.h @@ -386,3 +386,4 @@ SYSCALL(mlock2) SYSCALL(copy_file_range) COMPAT_SYS_SPU(preadv2) COMPAT_SYS_SPU(pwritev2) +SYSCALL(rseq) diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h index cf12c580f6b2..a01e97d3f305 100644 --- a/arch/powerpc/include/asm/unistd.h +++ b/arch/powerpc/include/asm/unistd.h @@ -12,7 +12,7 @@ #include -#define NR_syscalls 382 +#define NR_syscalls 383 #define __NR__exit __NR_exit diff --git a/arch/powerpc/include/uapi/asm/unistd.h b/arch/powerpc/include/uapi/asm/unistd.h index e9f5f41aa55a..d1849d64c8ef 100644 --- a/arch/powerpc/include/uapi/asm/unistd.h +++ b/arch/powerpc/include/uapi/asm/unistd.h @@ -392,5 +392,6 @@ #define __NR_copy_file_range 379 #define __NR_preadv2 380 #define __NR_pwritev2 381 +#define __NR_rseq 382 #endif /* _UAPI_ASM_POWERPC_UNISTD_H_ */